Threaded bung opening construction



June 27, 1933.h 4 c. DRPER n 1,?15,300 l .THREADED BUNG OPENING CONSTRUCTION* Filed June 27, 1932 rrOeA/Eys liquid, or semi-soli .40 element may be 're'iadilyr connected.

Patented June 27, 1933 UNITED STATES PATENT OFFICE CHARLES T. DRAPER, OEl CLEVELAND HEIGHTS, omo, AssIGNoR To THE DRAPEE .MANUFACTURING COMPANY, or CLEVELAND, OHIO, A CORPORATION or OHIO THBEADD BUNG OPEN'ING CONSTRUCTION Application filed .Tune 27,

The invention relates to bung opening construction for metallic containers, barrels, drums, vessels, packages and the like utilized for shipping, storin and/or dispensing fluid;

d materials; and relates more particularly to a simplified bung opening construction to which a threaded member may be readily connected, and which may be Closed by any one of a' number of'kinds of usual and Well known closure members.

Metallic containers are Widely used for` transporting, storing and ldispensing various kinds of lubricating Oils, and pumps having threaded tubular members connected to the containers are invariably utilized for drawing off the contents of such containers. Metallic containers are therefore almost universally provided with threaded bung rings so as to provide for the connection of the threadyed tubular members of such pumps to the head of `a metallic container, and the openings prvided by the threaded bungl rings are Closed for the purpose of shipment and storage by a threaded closure plug.

The manufacture of such threaded bung rings and closure plugs, and the assembly of,

the threaded bung rings to container Walls involve considerable expense and therefore add appreciably to the cost of manufacturing containers'adapted f or threaded connection .35 with a dispensing pump.

A primary object of the present invention therefore is to provide a container bung Opening construction in a.l simple and inexpensive manner, to which,v a threaded `tubular pump A further objectJ of the present invention is to providea container bung opening construction to which a threaded member may be readily connected without utilizing a separate specially cast, forged or machined,,

threaded bung ring and the like assembled to thea/container wall. jf v Affurther object of the .present invention is to provide a bung opening coljstruction which .59 does not use o1' require a special bung ring for 1932. serial No. 619,484.

-connection with athreaded member, and

which may beclosed for shipping and storage purposes by any one of a number of -usual types of closures. L

Moreover, it is a further object of the present invention to provide a bung opening construction in ,which the bung Opening includes a neck integral with the container wall and' an inturned fiange in telescopicthreadedconnection with a threaded member.

And finally, it is an object of the present invention to provide a container bung Opening construction, which accomplishes thev aforesaid desiderata, and which has an extremely simple design and a very inexpensive manufacturing cost. i

`These and other objects may be'obtained by the elements. parts, combinations and con` structions constituting the present invention, preferred embodiments of which'are shown in the accompanying drawing and are hereinafter claimed and described in detail, which may be stated in general terms as including in metallic container construction, a wall provided with a preferably integral tubular neck forming a bung opening for the container projecting or elgtending preferably inwardly of the container from the wall, the neck l turned flange, andsaid member having a part inl abutment with the wall and/or neck for` seating the threaded member in the neck.

ln the drawing'J Figure 1 is a vertical section through a conf tainer wall formed with a tubular neck terproviding a container bung opening;

. Fig. 2 is a vertical section similar to Fig. 1, showing thelip notched a'nd formed into one tuiinof a helical thread; l

Fig. 3 is a fragmentary section taken on the line 3 3, Fi g2, showing the notchedlip;

Fig. 4 is .a plan View of the bung opening shown in Fig. 2; 'i

' Fig. iis a vertical sectlon throughthe bung I Opening'sliown in Fig. 2, provided wlth a thm metal cup and substantiallyigid plug closure;

Fig. 6 is a view similar' to Fig. 5 showing the bung opening provided with a thinv metal locking cup closure;

Fig. 7 is a view similar to Figa 5 showing the bung opening provided with a usual threaded plug closure;

Fig. 8 is a view Ysimilar to Fig. 5 showing the bung opening provided with a'common wooden bung;

Fig. 9 is .a vertical section through the bunO opening shown in Fig. 2,- having a threade tubular member connected thereto and Fig. 10 is a vertical section through a bung opening such as shown in Fig. 1 in which the lip has been provided with one turn of a helicakl thread by a thread forming tool or the li e.

Similar numerals. refer to similar parts throughout the various figures in` the drawin gIhe wall 11 of the container is preferably initially provided, as shown in Fig. 1, with a preferably integral tubular neck 12, which projects preferably inwardly of the container and terminates in an inturned annular flange or lip 13, to form a bung opening for the container; and the container wall is preferably reinforced against distortion at and adjacent to the opening by providing the. raised annular shoulders 14 at and adjacent tothe opening.

The lip 13 is then provided with one circumferentially complete thread formation preferably by notching the same at 15, as shown in Figs. 2, 3, 4, 5 and 9, and shaping the lip 13 to form one turn of a helical thread 13a.-

A threaded member, such as a pipe or tubular dispensing pump connection 16 (Fig. 9), having a threaded portion 17, may then be readily and quickly seated in the bung opening in threaded connection with the lip 13a.

The pipe threads 17 are slightly tapered, as shown in Fig. 9, so that as they are threadcd intothe bung opening, the upper threaded parts 17a abut against and bite into the inner surface of the tubular neck v12, and the prevention of downward movement of the part 17a causes the lip thread 13a 4to be pulled upwardly and thus into the thread 17. In this manner tight substantially annular bearing areas are provided, which are spaced from each other and produce a rigid mounting of the tube 16 in the neck 12. Pump connections `are frequently formed with a flange which is tightly drawn downwardly against the shoulder 14 bythe engagement of the threads 17 with the thread 13a thus also producing a rigid mounting of the flanged pump connection in the opening.

Accordingly, the present improved bung opening construction provides a simple but eiiicient threaded bung opening for a metallic container, to whicha threaded dispensing pump connector or other threaded member or' pipe may be readily connected, without utilizing .a specially separately manufactured `and assembled bung ring.

sure means, such as shown in my Patent N0.

1,838,136, dated December 29, 1931, which includes a preferably thin metal cup-shaped member 18, a preferably solid or substantially rigid plug member 19 formed preferably of wood, hard rubber, or other distortion resisting but unbreakable material, referred to herein as a rigid plug, and a liquid sealing gasket 20.

The closureJ means shown in Fig. 6 for the present improved threaded bung opening is of the type described in my Patent No. 1,381,704, dated June 14, 1921, and includes a 'thin metal friction cup member 21 provided with locking projections 22 projecting beneath the lip 13a, anda liquid sealing gasket 23.

Fig. 7 shows the present improved threaded bung opening provided with closure means includingv a liquid sealing gasket 24fand a standard threaded plug 25, the threads of which engage the thread lip 13a, and the head part 26 of which clamps the gasket 24 against the container wall th'ereby being in l liquid sealing abutment with the container wall. r

Fig. ,8 shows the present improved threaded bung opening provided with closure means which comprises the ordinary well known wooden or hard rubber bung or stopper 27 and the like.

A slightly modified form of improved threaded bung opening is shown in Fig. 10, in which the one circumferentially complete thread formation 13b on the inner edge of the lip 13 is provided by passing a threading tool and Vthe like into bung opening shown in Fig. '(1.

The improved construction fully lends itself to all requirements and uses for metallic containers during shipping, storing and dispensing, and provides a simplified and inexpensive bung opening constructionto which a threaded member may be readily connected and which may be closed by any one of a number of kinds of usual and well known closure means, without requiring a special threaded bung ring to be assembled to lthai @container wall. l

lio

" The above description and the drawing referred to therein, are illustrative of struci tures embodying my invention, and the claims appended hereto are intended to cover such modifications of and slight changes in thev structures shown and described, as are apparent to those skilled in the art.

I claim 2,-

1'. In metallic container construction, a Wall provided With a tubular neck projecting therefrom. forming a-bung opening, the neck terminating in an inturned lip, the'lipbeing provided with a slit, the slit lip being shaped to form one turn of a helical thread,

and a threaded member seated in the bung opening'in threaded connection with the lip. 2. In metallic container construction, a wall provided With a tubular neck projecting therefrom forming a bung opening, the neck terminating in an inturned lip, thel lip being provided with a slit, and the slit lip being shaped to form one turn of a helical thread. 3. In metallic container construction, a Wall provided With a tubular neck projecting therefrom forming a bung opening, the neck terminating in an inturned lip, the lip being provided with a slit, the slit lip being shaped to form one turn of a helical thread, 'and closure means seated in the bung opening.

4. In metallic container construction, -a Wall provided with a tubular neck projecting therefrom forming a bung opening, the neck terminating in an inturned lip, the lip consisting of one circumferentially complete thread formation, and a threaded member seated in the bung opening in threaded connection with the lip.

5. In metallic container construction, a Wall provided with a tubular neck projecting therefrom forming a bung opening, the neck terminating in an inturned lip, the lip consisting of one circumferentially complete .thread formation, a threaded member in the bung opening in threaded connection with the lip, and the threaded ymember having a part in liquid sealing abutment with the container wall. c

6. In metallic container construction,I a Wall provided with a tubular neck projecting therefrom forming a bung opening, the neck terminating in an inturned lip, the lip consisting of one circumferentially complete wall rovided withva tubular neck projecting t erefrom forming a bung o emng, the

neck terminating in an inturned 'p, the inner edge of the lip consisting of one circumferentially complete thread, and a threaded thread formation, a threaded member in the bung opening in threaded connection with the lip, and the threaded member having a partrin abutment with the neck.

7 In metallic container construction, a Wall provided with a tubular neck projecting integrally therefrom inwardly of the container forming abung opening, the neck terminating in an inturned lip, the lip consisting of one circumferentially complete thread formation, and a threaded member seated in the bung opening in threaded connection ,with

the lip.

'8. In metallic container construction, a 

